Highly selective and sensitive trimethylamine gas sensor based on cobalt imidazolate framework material

ACS Appl Mater Interfaces. 2014 Dec 24;6(24):22871-5. doi: 10.1021/am5071317. Epub 2014 Dec 3.

Abstract

A cobalt imidazolate (im) framework material [Co(im)2]n was employed to use as a trimethylamine (TMA) gas sensor and the [Co(im)2]n sensor can be easily fabricated by using Ag-Pd interdigitated electrodes. Gas sensing measurement indicated that the [Co(im)2]n sensor shows excellent selectivity, high gas response and a low detection limit level of 2 ppm to TMA at 75 °C. The good selectivity and high response to TMA of the sensor based on [Co(im)2]n may be attributed to the weak interaction between the TMA molecules and the [Co(im)2]n framework. That may provide an ideal candidate for detecting freshness of fish and seafood.

Keywords: cobalt imidazolate framework; gas sensor; selectivity; trimethylamine.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cobalt / chemistry*
  • Conductometry / instrumentation*
  • Electrodes
  • Food Analysis / instrumentation*
  • Food Contamination / analysis*
  • Gases / analysis
  • Gases / chemistry
  • Imidazoles / chemistry*
  • Methylamines / analysis*
  • Methylamines / chemistry
  • Reproducibility of Results
  • Sensitivity and Specificity

Substances

  • Gases
  • Imidazoles
  • Methylamines
  • Cobalt
  • trimethylamine